Installation manual

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SIMPLEX Fault Assistance Guide RevA
29 April 2009
1.1.2.3 Short Circuit Abnormal
Description:
The addressable loop has a short circuit.
Possible causes:
 If there are no isolators fitted or the short is between the panel and the isolator then
the loop will stop operating. This may also display a channel fail
 Find the short circuit and fix – disconnect the loop totally, check each pair for a
short circuit with a Multimeter. If fault evident continue these checks at half way
points around loop until short is narrowed down
 If short circuit cannot be detected with a Multimeter, disconnect one side of the loop
only and disconnect devices at half way points until the short circuit fault clears, to
narrow down the fault location.
NOTE: Panel will need to be reset between each disconnection as this fault
will latch)
1.1.2.4 Class ‘A’ Abnormal
Description:
The addressable loop or RUI Bus has an open circuit.
Possible causes:
 Open circuit in the wiring loop
 Bad connection at addressable point (on addressable loop faults).
 Bad connection at remote transponder or LCD Annunciator (for RUI Bus faults)
 Faulty addressable loop or RUI card
- Check this fault by ‘looping out’ the A and B terminals on the
RUI/Mapnet/IDNet card to clear the fault. If fault does not clear then card
may be faulty